The selfie craze has reached a new low: People are now taking the social snaps at sacred places like the Auschwitz concentration camp and New York's 9/11 memorial.

It's not that hard to believe considering how ubiquitous the social media photos have become. Miley Cyrus took one from a hospital bed, Ellen DeGeneres did it at the Oscars and, even though his finger wasn't on the trigger, President Obama took one at a funeral.

Senning, Emily Post's great-grandson, wasn’t fazed by the snapshot Cyrus took earlier this year to let fans know she was sick in the hospital.

"To me, that doesn’t sound inappropriate,” he said. “It didn’t intrude on anyone’s privacy. She didn’t take a picture of a wound or rash – nothing gross.”

When taking photos at a hospital, Senning stressed context is just as important as content.

"A hospital is a place where you want to be careful about everyone’s privacy,” he said. “You have to ask yourself, how appropriate is it to be sharing what I’m sharing? If you’re celebrating a new birth, it’s absolutely appropriate to share a photo with friends and family. But to share that same photo on Facebook? People might find that inappropriate."